Locking device for elevators



(No Model.) 2 Sheets-Sheet 1. T. W. JENKINS. LOCKING DEVICE FORELEVATORS.

No. 540,813. Patented June 11, 1895.

Inventor.

Witnesses.

Attorney.

(No Model.) 2 Sheets-Sheet 2.

T. w. JENKINS. LOGKINGDEVIGE FOR ELEVATORS. No. 540,813. I Patented June11,1895.

'tnsses' Tl Inventor. fl/,;%;M% 2

Attorney.

THOMAS VVfJENKINS, OF PHILADELPHIA, PENNSYLVANIA.

LOCKING DEVICE 'FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 540,813, dated June 11,1895.

' Application filed November 30, 1894:. Serial No. 530,357- (No model.)

To all whom, it may cancer-7M Be it known that I, THOMAS W. JENKINS, acitizen of the United States, residing at Phil'a. delphia, in the countyof Philadelphia and State of Pennsylvania,have invented certain new anduseful Improvements in Looking Devices for Elevators; and I do declarethe following to be a full, clear, and exactdescription of theinvention, such as willenable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a partof, this specification.

My invention relates to safety attachments for elevators and the objectsof my improvements are, first, to lock the-power controlling mechanism,in such a manner that the car or cab of the elevator cannot be moved upor down from any landing until the door to the elevator well has firstbeen closed; second,to securely fasten the door of the well of theelevator, should the latch ordinarily placed thereon, fail to catch whenthe door is pushed over by the attendant in the elevator.

I accomplish the desired, result by means of suitable mechanism attachedto the car of the elevator and operated by the opening and closing ofthe door to the well of the elevator, as will be hereinafter describedand more particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a front view of anelevator-car and a section of the wall of the elevator-well. Fig. 2 is ahorizontal sectional view of the car above the floor. Fig. 3 is a detailview of the rod or bar attached to the bottom of the door to theelevator-Well. Fig.4 isa front view of an elevator-car having the doorbroken away and showing myimprovement attached to a wheel instead of thelever shown in Fig. 1. Fig. 5 is a plan VlBW of the disk andconnecting-levers attached underneath the car. Fig. 6 is a face view ofthe disk secured back of the power-controlling wheel shown in Fig. 3.

A, is the elevator car or cage which is of the usual construction andoperated in the ordinary manner..

A, is the sliding door secured in the elevator Well at each landing.

B, is the lever or power controlling mechanism shown in Fig. 1.

O, is an iron disk secured under the floor of the car and turning on thecentral shaft 0..

b, is an iron link attached atone end to the under side of the disk G,at b, the opposite end being secured to the crank O.

D, is a plate or bracket secured underneath the floor of the car andsupporting the crank O. I

d, is a curved lever one end of which rests upon the crank O, theopposite end being pivoted at d, to the plate or bracket D. E, is averticaltlock rod attached to the lever B,- and sliding up and down inthe guides or straps e, e. The lower end of this lock rod rests upon thecurved part of the lever d.

F, is a guide for the upper end of the le-- ver B.

f, is a slot in the guide F,-for the reception of the upper end of thelock rod E.

c, o, are two pins in the rim of the disk 0.

a,is a bar or rod secured rigidly to the sliding door A, in such aposition that when the car of the elevator stops at or passes anylanding the bar a, will be between the pins 0,0, in the position shownin Fig. 1.

The car or cage A, of the elevator being fitted with the above describedmechanism arranged as shown in Figs. 1 and 2, and having arrived at alanding, the sliding door A, is opened by sliding it back toward thelever B. ,Asit moves along in that direction, the

When the elevator car A, is provided with a power controlling wheel B,instead of the lever B, the wheel is frequently placed on the oppositeside of the car, in the position shown in Fig. 3, and the operation ofmy device is slightly different. The jointed link b ,operating the lockrod E, is connected at one end to the pin 1), in the disk 0, and at theopposite end to the crank 0 that operates the lock E, which is pushedinto the notch in the disk F, secured back of the power controllingwheel B.

\Vhen the locking mechanism is arranged.

in the manner shown in Figs. 4 and 5, the opening of the sliding doorwill cause the several parts to operate and shove the end of the lockrod E, into the notch la, in the disk F. The mechanism secured to thewall of the elevator well for holding said door locked in position inthe event of a failure to latch when thrown 'back, is also operated bythe opening and closing of the door and its construction is as follows:

G, represents a bracket fastened to the side wall of the elevator; g, aswinging lever secured therein.

g,is a small roller or projection secured in the side of the lever g, ashort distance from the free end thereof.

H, is a bracket fastened on the front wall of the well of the elevator.

h, is a latch pivoted to the bracket H.

h, is an enlarged end or head on the latch h, the slanting edge of whichrests upon the roller 9.

h is a rod one end of which is attached to a pin on the disk 0. Theopposite end of this rod is loosely supported by the strap piece it,secured on the floor of the car.

If, is the bent-over end of the rod h This rod 7L2 together with thedisk constitutes the mechanism secured to the elevator car t h roughwhich the door locking mechanism is operated by the sliding back andforth of the door of the elevator well.

a is a bumper or stop for the forward end of the latch 72, fastened onthe inside of the elevator door A.

hen the latch 72, is in the position shown in Figs. .1 and 4., theopening of the door A, turning the disk (1, will move the lever 7L2,causing the bent over end It, to strike against the free lower end ofthe lever g, pushing it back toward the wall and causing the roller g,to raise the end of the latch h, that rests thereon. This movement willdepress the opposite end of said latch and allow it to pass under thestop a between the bar a, and the bottom edge of the door A. It' theelevator car is not at the landing, there will be no means of operatingthe latch h, and the end will strike against the bumper or stop (1 thatis attached to the sliding door A. Consequently the door A, on a failureto latch properly, can only be opened the distance between the inner endof the latch 71., and the outer edge of the sliding door A, which wouldonly be about four inches.

Having thus described my invention, what I claim as new is- 1. In anelevator, the door A, and a suitable mechanism secured to the wall ofthe elevator well for holding said door locked, in combination with thecar and mechanism secured thereto through which the said lockingmechanism is operated by the movement of the door, as set forth.

2. In an elevator, the combination of the door A provided with a bar a,the car and disk C journaled thereto and having on its periphery meansfor engaging the bar a, and a crank connected with said disk, with thepower controlling mechanism, a lock rod operated by said crank, andadapted to engage and lock the power controlling mechanism when the dooris open, as set forth.

3. In an elevator, the combination of the door A provided with bar a,the car and disk 0 journaled thereto and having the pins 0, c, thereon,crank G, lever d, resting on said crank, and lock rod E resting on saidlever, with the power controlling mechanism, whereby the said powercontrolling mechanism will be locked to prevent the movement of the caruntil the door A is closed, as set forth.

4. In an elevator, the door A provided with the bar a, in combinationwith the car, the disk 0 journaledthereto and having on its peripherythe pins 0, c, to engage said bar a when the car is at a floor, thepower controlling mechanism,and connections between said powercontrolling mechanism and the disk (3 whereby the said power controllingmechanism is locked when the door is open, as set forth.

5. In an elevator, the combination of the door A, having thereon the bara, with the car and disk 0 journaled thereto and having thereon the pins0, c, the rod 71 the lever g, and the pivoted latch h, as set forth.

6. In an elevator, the combination of the door A, having thereon a baraand provided with a stop or bumper a with the car and disk 0 journaledto the car and having the pins 0, c, on the periphery thereof, the rod7L2, the lever 9 having thereon the roller r, and the pivoted latchhhaving on its rear end the enlarged head It, as set forth.

In testimony whereof I afiix my signature in presence of two witnesses.

THOMAS W. JENKINS.

Witnesses:

SAML. l-I. KIRKPATRICK, 'tHos. D. MOWLDS.

